# Mautic Marketplace plugin install -- does not react **URL:** \ **Category:** Product Support\ **Tags:** mautic-4\ **Created:** [August 7, 2023, 10:10am UTC](https://forum.mautic.org/t/mautic-marketplace-plugin-install-does-not-react/28860 "2023-08-07T10:10:01Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Ziedpad](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ziedpad/32/3736_2.png) [@Ziedpad](https://forum.mautic.org/u/Ziedpad)\ **Post date:** [August 7, 2023, 10:10am UTC](https://forum.mautic.org/t/mautic-marketplace-plugin-install-does-not-react/28860/1 "2023-08-07T10:10:01Z")
**Your software** Mautic Version: 4.4.9 PHP version: 8.0 Browser: Chrome **Your problem** Mautic Version: 4.4.9 Php: 8.0 Composer Version: 2.5.8 I chose a Plugin from Mautic - Marketplace, and by clicking on install a PopUp opens to start the installation but in Browser-debug an error which is as follows: [![image](https://us1.discourse-cdn.com/flex020/uploads/mautic/original/2X/4/44c9a3cdeadbaddb121e273bf9070aa39d052cb4.png)](https://user-images.githubusercontent.com/48432954/258766187-6a42d5a1-6009-444e-bf61-fc798215ba12.png) These errors are showing in the log: The HOME or COMPOSER\_HOME environment variable must be set for composer to run correctly require [–dev] [–dry-run] [–prefer-source] [–prefer-dist] [–prefer-install PREFER-INSTALL] [–fixed] [–no-suggest] [–no-progress] [–no-update] [–no-install] [–update-no-dev] [-w|–update-with-dependencies] [-W|–update-with-all-dependencies] [–with-dependencies] [–with-all-dependencies] [–ignore-platform-req IGNORE-PLATFORM-REQ] [–ignore-platform-reqs] [–prefer-stable] [–prefer-lowest] [–sort-packages] [-o|–optimize-autoloader] [-a|–classmap-authoritative] [–apcu-autoloader] [–apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [–] […] {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959} [2023-08-07 11:45:48] mautic.ERROR: Installation of plugin through Composer has failed: {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959} [2023-08-07 11:46:04] mautic.WARNING: PHP Warning - require(/var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/getSwiftmailer\_EmailSender\_ListenerService.php): Failed to open stream: No such file or directory - in file /var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/appAppKernelProdContainer.php - at line 2364 {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959} [2023-08-07 11:46:04] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\FatalThrowableError: “Failed opening required ‘/var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=‘.:/usr/share/php’)” at /var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/appAppKernelProdContainer.php line 2364 {“exception”:"[object] (Symfony\Component\Debug\Exception\FatalThrowableError(code: 0): Failed opening required ‘/var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=‘.:/usr/share/php’) at /var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/appAppKernelProdContainer.php:2364) [stacktrace] #0 /var/www/html/mautic/var/cache/pro\_/ContainerGXZw3Mj/appAppKernelProdContainer.php(2597): ContainerGXZw3Mj\appAppKernelProdContainer-\>load() #1 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(301): ContainerGXZw3Mj\appAppKernelProdContainer-\>ContainerGXZw3Mj\{closure}() #2 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(264): Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}() #3 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(239): Symfony\Component\EventDispatcher\EventDispatcher-\>doDispatch() #4 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(73): Symfony\Component\EventDispatcher\EventDispatcher-\>callListeners() #5 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(103): Symfony\Component\EventDispatcher\EventDispatcher-\>dispatch() #6 /var/www/html/mautic/vendor/symfony/http-kernel/Kernel.php(166): Symfony\Component\HttpKernel\HttpKernel-\>terminate() #7 /var/www/html/mautic/vendor/stack/builder/src/Stack/StackedHttpKernel.php(32): Symfony\Component\HttpKernel\Kernel-\>terminate() #8 /var/www/html/mautic/vendor/stack/run/src/Stack/run.php(16): Stack\StackedHttpKernel-\>terminate() #9 /var/www/html/mautic/docroot/index.php(24): Stack un() #10 {main} “} {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959} [2023-08-07 11:46:04] mautic.CRITICAL: Exception thrown when handling an exception (RuntimeException: Failed to start the session because headers have already been sent by “/var/www/html/mautic/vendor/symfony/http-foundation/Response.php” at line 1239. at /var/www/html/mautic/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php line 152) {“exception”:”[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/html/mautic/vendor/symfony/http-foundation/Response.php" at line 1239. at /var/www/html/mautic/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:152) [stacktrace] #0 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php(359): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage-\>start() #1 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Session.php(251): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage-\>getBag() #2 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Session.php(273): Symfony\Component\HttpFoundation\Session\Session-\>getBag() #3 /var/www/html/mautic/vendor/symfony/http-foundation/Session/Session.php(73): Symfony\Component\HttpFoundation\Session\Session-\>getAttributeBag() #4 /var/www/html/mautic/docroot/app/bundles/CoreBundle/EventListener/EnvironmentSubscriber.php(47): Symfony\Component\HttpFoundation\Session\Session-\>get() #5 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(264): Mautic\CoreBundle\EventListener\EnvironmentSubscriber-\>onKernelRequestSetTimezone() #6 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(239): Symfony\Component\EventDispatcher\EventDispatcher-\>doDispatch() #7 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(73): Symfony\Component\EventDispatcher\EventDispatcher-\>callListeners() #8 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(145): Symfony\Component\EventDispatcher\EventDispatcher-\>dispatch() #9 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(81): Symfony\Component\HttpKernel\HttpKernel-\>handleRaw() #10 /var/www/html/mautic/docroot/app/bundles/CoreBundle/EventListener/ExceptionListener.php(67): Symfony\Component\HttpKernel\HttpKernel-\>handle() #11 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(264): Mautic\CoreBundle\EventListener\ExceptionListener-\>onKernelException() #12 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(239): Symfony\Component\EventDispatcher\EventDispatcher-\>doDispatch() #13 /var/www/html/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(73): Symfony\Component\EventDispatcher\EventDispatcher-\>callListeners() #14 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(229): Symfony\Component\EventDispatcher\EventDispatcher-\>dispatch() #15 /var/www/html/mautic/vendor/symfony/http-kernel/HttpKernel.php(120): Symfony\Component\HttpKernel\HttpKernel-\>handleThrowable() #16 /var/www/html/mautic/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php(129): Symfony\Component\HttpKernel\HttpKernel-\>terminateWithException() #17 /var/www/html/mautic/vendor/symfony/error-handler/ErrorHandler.php(601): Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::Symfony\Component\HttpKernel\EventListener\{closure}() #18 [internal function]: Symfony\Component\ErrorHandler\ErrorHandler-\>handleException() #19 {main} "} {“hostname”:“debian-4gb-nbg1-1”,“pid”:307959} Steps I have tried to fix the problem: ---
**Author:** ![zaharovrd](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/zaharovrd/32/7799_2.png) [@zaharovrd](https://forum.mautic.org/u/zaharovrd)\ **Post date:** [August 5, 2024, 8:49am UTC](https://forum.mautic.org/t/mautic-marketplace-plugin-install-does-not-react/28860/2 "2024-08-05T08:49:51Z")
Hi, is there any integration with OpenCart? ---
**Author:** ![joeyk](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/joeyk/32/11164_2.png) [@joeyk](https://forum.mautic.org/u/joeyk)\ **Post date:** [August 6, 2024, 4:32pm UTC](https://forum.mautic.org/t/mautic-marketplace-plugin-install-does-not-react/28860/3 "2024-08-06T16:32:59Z")
No, there isn’t.